Yuo can only do 8 per 36 hours. If everything works out in a few hours you should be able to get 8 more. The trick is to getting friends together. do them one after each other.
FFXI:(Remora -> Leviathan -> Shiva) WHM, BLM, RDM, THF, SAM, DNC
FFXIV: (Rabanastre) Working on: CON ~ LNC